Recent developments in LEDs permit them to be used in environmental and task lighting. LEDs have many advantages over incandescent light sources including lower energy consumption, longer lifetime, improved physical robustness, smaller size, and faster switching. Light-emitting diodes are now used in applications as diverse as aviation lighting, automotive headlamps, advertising, general lighting, traffic signals, camera flashes and lighted wallpaper. As of 2015[update], LEDs powerful enough for room lighting remain somewhat more expensive, and require more precise current and heat management, than compact fluorescent lamp sources of comparable output. 

Electroluminescence as a phenomenon was discovered in 1907 by the British experimenter H. J. Round of Marconi Labs, using a crystal of silicon carbide and a cat's-whisker detector. Soviet inventor Oleg Losev reported creation of the first LED in 1927. His research was distributed in Soviet, German and British scientific journals, but no practical use was made of the discovery for several decades. Kurt Lehovec, Carl Accardo and Edward Jamgochian, explained these first light-emitting diodes in 1951 using an apparatus employing SiC crystals with a current source of battery or pulse generator and with a comparison to a variant, pure, crystal in 1953. What are the answers to this following set of questions: 1. What is the article about?
2. What does this stand for?
3. When were they first created?
4. By whom?
5. What was his occupation?
6. What became of his discovery?
7. Were other scientists responsible in the advancement?
8. How many?
9. Can you name one?
10. When did they help advance the theory?
11. How are they applied today?
12. any other ways?
13. What are those?
14. Are they cheap?
15. Are they hotter than standard bulbs?
16. While producing the same light?
17. Do they consume more power than standard bulbs?
18. Do they last longer?
19. Can they be seen on walls?
20. How do they benefit a photographer?
Answer: 1. LEDs
2. Light-emitting diodes
3. 1927
4. Oleg Losev
5. inventor
6. was distributed in Soviet, German and British scientific journals
7. yes
8. Three
9. Kurt Lehovec
10. 1951
11. environmental and task lighting.
12. yes
13. aviation lighting, automotive headlamps, advertising, general lighting, traffic signals, camera flashes and lighted wallpaper
14. no
15. yes
16. no
17. no
18. yes
19. yes
20. camera flashes

Copenhagen is the capital and most populous city of Denmark. The city has a population of 763,908 (), of whom 601,448 live in the Municipality of Copenhagen. The larger urban area has a population of 1,280,371 (), while the Copenhagen metropolitan area has just over 2 million inhabitants. Copenhagen is situated on the eastern coast of the island of Zealand; another small portion of the city is located on Amager, and is separated from Malmö, Sweden, by the strait of Øresund. The Øresund Bridge connects the two cities by rail and road. 

Originally a Viking fishing village founded in the 10th century, Copenhagen became the capital of Denmark in the early 15th century. Beginning in the 17th century it consolidated its position as a regional centre of power with its institutions, defences and armed forces. After suffering from the effects of plague and fire in the 18th century, the city underwent a period of redevelopment. This included construction of the prestigious district of Frederiksstaden and founding of such cultural institutions as the Royal Theatre and the Royal Academy of Fine Arts. After further disasters in the early 19th century when Nelson attacked the Dano-Norwegian fleet and bombarded the city, rebuilding during the Danish Golden Age brought a Neoclassical look to Copenhagen's architecture. Later, following the Second World War, the Finger Plan fostered the development of housing and businesses along the five urban railway routes stretching out from the city centre. What are the answers to this following set of questions: 1. What is the article about?
2. What kind of a village was it originally?
3. When was it founded?
4. When did it become the capital?
5. Of what country?
6. What is it’s urban area population?
7. What sickness did it suffer from?
8. And what else did it suffer from in the 18th century?
9. Were there more disasters later?
10. Where is it situated?
11. Which bridge connects two cities?
12. What did the finger plan do?
13. after which war was this?
14. Who did nelson attack?
15. and what else did he do?
16. How many live in the municipality?
17. What did the Danish Golden age do?
18. Is it the most populous city?
19. What was constructed in the 18th century?
20. What happened in the 17th century?
Answer: 1. Copenhagen
2. a Viking fishing village
3. in the 10th century
4. in the early 15th century
5. of Denmark
6. just over 2 million
7. the plague
8. and fire
9. no
10. eastern coast of the island of Zealand
11. The Øresund Bridge
12. the Finger Plan fostered the development of housing and businesses along the five urban railway routes stretching out from the city centre.
13. the Second World War
14. Nelson attacked the Dano-Norwegian fleet
15. bombarded the city
16. 601,448
17. it brought a Neoclassical look to Copenhagen's architecture
18. yes, most populous city of Denmark
19. the prestigious district of Frederiksstaden
20. it consolidated its position as a regional centre of power

Jenny wanted to encourage students to read more famous books, so she decided to put an introduction to some interesting children's story books in the school newspaper. The Little Prince (<<>> is a famous work written by French writer Antoine de Saint-Exupery. In the book, the little prince leaves his own planet to explore the universe . In his journey, he finds that the adult world is really strange and boring. Finally, he goes back to his planet which is full of love. The book is really popular throughout the world. Charlotte's Web (<<>> is a famous children's novel written by American author E. B. White. The novel tells the story of a pig named Wilbur and his friendship with a spider named Charlotte on a farm. When Wilbur is in danger of being killed for his meat by the farmer, Charlotte writes messages to _ Wilbur in her web and saves him. Wilbur becomes famous in the village and he is safe in the end. When it came out in 1952, the book was welcomed by both adults and children. And it is still very popular today. The Miraculous Journey of Edward Tulane (<<>> is a 2006 novel written by Kate DiCamillo. The book is about an unusual journey of a china rabbit named Edward Tulane. He travels from one place to another, meeting many people. During his journey, he learns to love and finally finds love again. This book is popular nowadays and was mentioned many times in the famous South Korean TV series My love from the Star (<<>> . The warm and sweet story will surely make you understand more about love. What are the answers to this following set of questions: 1. What show was broadcast in South Korea?
2. What is used to save the pig?
3. Who wove the web?
4. Who was saved?
5. What is he?
6. Who wanted to kill him?
7. Why?
8. Where did he find fame?
9. Who wrote the book about the young royal person?
10. What is his nationality?
11. What was the title?
12. From where does the boy go?
13. What did he find there?
14. What was it like?
15. Upon return, how did he find his home planet?
16. Who wrote about saving the barnyard animal from becoming bacon?
17. What's his nationality?
18. Who wrote about the trip a rabbit took?
19. In what year?
20. What was it's title?
Answer:
1. My love from the Star
2. Charlotte writes messages to _ Wilbur in her web and saves him.
3. Charlotte
4. Wilbur.
5. A pig.
6. The farmer.
7. For his meat.
8. In the village
9. Antoine de Saint-Exupery.
10. French.
11. The Little Prince.
12. To explore the universe .
13. The adult world
14. Strange and boring.
15. Full of love.
16. E. B. White.
17. American.
18. Kate DiCamillo.
19. 2006
20. The Miraculous Journey of Edward Tulane